| 1 | The speech sounds of all languages are gradually but constantly changing. | |
| 2 | His voice still stood with courage. | |
| 3 | When talking on the phone your tone of voice is all important. | |
| 4 | You will even be able to do this via a voice interface. | |
| 5 | This is the same voice search technology that they use in their free directory service, GOOG-411. |
